WO2005002055A3 - Fractional-n synthesizer and method of programming the output phase - Google Patents

Fractional-n synthesizer and method of programming the output phase

Info

Publication number
WO2005002055A3
WO2005002055A3 PCT/US2004/020546 US2004020546W WO2005002055A3 WO 2005002055 A3 WO2005002055 A3 WO 2005002055A3 US 2004020546 W US2004020546 W US 2004020546W WO 2005002055 A3 WO2005002055 A3 WO 2005002055A3
Authority
WO
WIPO (PCT)
Prior art keywords
fractional
reference signal
phase
input reference
responsive
Prior art date
Application number
PCT/US2004/020546
Other languages
French (fr)
Other versions
WO2005002055A2 (en
Inventor
Patrick Walsh
Michael F Keaveney
Original Assignee
Analog Devices Inc
Patrick Walsh
Michael F Keaveney
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Analog Devices Inc, Patrick Walsh, Michael F Keaveney filed Critical Analog Devices Inc
Publication of WO2005002055A2 publication Critical patent/WO2005002055A2/en
Publication of WO2005002055A3 publication Critical patent/WO2005002055A3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/197—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
    • H03L7/1974—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division
    • H03L7/1976—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division for fractional frequency division using a phase accumulator for controlling the counter or frequency divider

Abstract

A fractional-N synthesizer (100’) with programmable output phase including a phase locked loop (12) having an output signal whose frequency is a fractional multiple of an input reference signal, the phase locked loop including a frequency divider (20). A synchronization circuit (102) responsive to the input reference signal for generating synchronization pulses at integer multiples of M periods of the input reference signal. An interpolator (106) is responsive to an input fraction F/M, where F is the fractional value, to provide to the frequency divider an output which is a fractional value equal to, on average, the input fraction. A phase adjustment circuit (302’) is responsive to the synchronization circuit for varying the phase of the output signal with respect to the input reference signal.
PCT/US2004/020546 2003-06-27 2004-06-25 Fractional-n synthesizer and method of programming the output phase WO2005002055A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US48341203P 2003-06-27 2003-06-27
US60/483,412 2003-06-27
US10/826,067 US7463710B2 (en) 2003-06-27 2004-04-16 Fractional-N synthesizer and method of programming the output phase
US10/826,067 2004-04-16

Publications (2)

Publication Number Publication Date
WO2005002055A2 WO2005002055A2 (en) 2005-01-06
WO2005002055A3 true WO2005002055A3 (en) 2006-05-04

Family

ID=33544663

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/020546 WO2005002055A2 (en) 2003-06-27 2004-06-25 Fractional-n synthesizer and method of programming the output phase

Country Status (2)

Country Link
US (1) US7463710B2 (en)
WO (1) WO2005002055A2 (en)

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US7840189B2 (en) * 2004-12-15 2010-11-23 Freescale Semiconductor, Inc. Frequency generation in a wireless communication unit
US7804927B2 (en) * 2004-12-16 2010-09-28 Analog Devices, Inc. Method for locking a synthesised output signal of a synthesised waveform synthesiser in a phase relationship with an input signal, and a digital waveform synthesiser for producing a synthesised output signal in a phase relationship with an input signal
WO2006091636A2 (en) * 2005-02-23 2006-08-31 Digital Intelligence, L.L.C. Signal decomposition and reconstruction
US20070153951A1 (en) * 2005-12-29 2007-07-05 Lim Chee H Phase interpolation for phase-locked loops
US7317360B2 (en) * 2006-04-20 2008-01-08 Analog Devices, Inc. Fractional-N synthesizer system and method
US7889012B2 (en) * 2008-05-06 2011-02-15 Hittite Microwave Corporation System and method for cycle slip prevention in a frequency synthesizer
US7876261B1 (en) * 2008-10-28 2011-01-25 Lockheed Martin Corporation Reflected wave clock synchronization
US8638139B2 (en) 2010-09-10 2014-01-28 Analog Devices, Inc. Phase locked loop (PLL) based frequency sweep generator
US8810290B1 (en) 2011-01-11 2014-08-19 Hittite Microwave Corporation Fractional phase locked loop having an exact output frequency and phase and method of using the same
TWI433475B (en) * 2011-08-16 2014-04-01 Mstar Semiconductor Inc Phase adjustment device and clock generator thereof and method for adjusting phase
EP2613442B1 (en) 2012-01-06 2015-05-13 u-blox AG A method for determining an offset term for a fractional-N PLL synthesizer signal, a synthesizer for carrying out the method, a signal processing device and a GNSS receiver
US8866667B2 (en) 2012-02-22 2014-10-21 Honeywell International Inc. High sensitivity single antenna FMCW radar
US9081094B2 (en) 2012-02-22 2015-07-14 Honeywell International Inc. Aircraft radar altimeter structure
US9297885B2 (en) 2012-07-27 2016-03-29 Honeywell International Inc. Method of system compensation to reduce the effects of self interference in frequency modulated continuous wave altimeter systems
US9194946B1 (en) * 2012-09-10 2015-11-24 Honeywell International Inc. Combined FMCW and FM pulse-compression radar systems and methods
US8994423B2 (en) * 2013-01-29 2015-03-31 Perceptia Devices Australia, Pty Ltd. Phase-locked loop apparatus and method
US8988121B2 (en) 2013-05-20 2015-03-24 Qualcomm Incoporated Method and apparatus for generating a reference signal for a fractional-N frequency synthesizer
US9048847B2 (en) 2013-09-24 2015-06-02 Analog Devices Global Apparatus and methods for synchronizing phase-locked loops
US9660605B2 (en) 2014-06-12 2017-05-23 Honeywell International Inc. Variable delay line using variable capacitors in a maximally flat time delay filter
US10018716B2 (en) 2014-06-26 2018-07-10 Honeywell International Inc. Systems and methods for calibration and optimization of frequency modulated continuous wave radar altimeters using adjustable self-interference cancellation
US10003346B2 (en) 2015-03-20 2018-06-19 Telefonaktiebolaget Lm Ericsson (Publ) Fractional PLLs with low correlation
US10224940B2 (en) * 2015-04-27 2019-03-05 Telefonaktiebolaget Lm Ericsson (Publ) Digital phase controlled PLLs
US9673847B1 (en) 2015-11-25 2017-06-06 Analog Devices, Inc. Apparatus and methods for transceiver calibration
US9979408B2 (en) 2016-05-05 2018-05-22 Analog Devices, Inc. Apparatus and methods for phase synchronization of phase-locked loops
US10153777B2 (en) * 2016-09-30 2018-12-11 Texas Instruments Incorporated Fractional frequency clock divider with direct division
US9893734B1 (en) 2016-10-03 2018-02-13 Analog Devices Global Adjusting phase of a digital phase-locked loop
US10855294B2 (en) 2016-11-08 2020-12-01 Texas Instruments Incorporated High linearity phase interpolator
WO2018090037A1 (en) * 2016-11-14 2018-05-17 Marvell World Trade Ltd. Systems and methods for phase synchronization of local oscillator paths in oscillator-operated circuits
US10557934B1 (en) * 2017-06-30 2020-02-11 Rockwell Collins, Inc. Altimeter apparatus for external fuselage mounting
US11082051B2 (en) 2018-05-11 2021-08-03 Analog Devices Global Unlimited Company Apparatus and methods for timing offset compensation in frequency synthesizers
US11602311B2 (en) 2019-01-29 2023-03-14 Murata Vios, Inc. Pulse oximetry system

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US6556086B2 (en) * 2001-05-31 2003-04-29 Analog Devices, Inc. Fractional-N synthesizer and method of synchronization of the output phase
US6600378B1 (en) * 2002-01-18 2003-07-29 Nokia Corporation Fractional-N frequency synthesizer with sine wave generator
US6621317B2 (en) * 2000-07-21 2003-09-16 Nec Electronics Corporation Clock controlling method and circuit

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US6353649B1 (en) * 2000-06-02 2002-03-05 Motorola, Inc. Time interpolating direct digital synthesizer
JP3415574B2 (en) * 2000-08-10 2003-06-09 Ｎｅｃエレクトロニクス株式会社 PLL circuit
US8385476B2 (en) * 2001-04-25 2013-02-26 Texas Instruments Incorporated Digital phase locked loop
US6642800B2 (en) * 2002-04-04 2003-11-04 Ati Technologies, Inc. Spurious-free fractional-N frequency synthesizer with multi-phase network circuit

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US6621317B2 (en) * 2000-07-21 2003-09-16 Nec Electronics Corporation Clock controlling method and circuit
US6556086B2 (en) * 2001-05-31 2003-04-29 Analog Devices, Inc. Fractional-N synthesizer and method of synchronization of the output phase
US6600378B1 (en) * 2002-01-18 2003-07-29 Nokia Corporation Fractional-N frequency synthesizer with sine wave generator

Also Published As

Publication number Publication date
US7463710B2 (en) 2008-12-09
WO2005002055A2 (en) 2005-01-06
US20040264622A1 (en) 2004-12-30

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